Contents

require 'gir_ffi/builder/type/registered_type'
require 'gir_ffi/builder/type/with_methods'
require 'gir_ffi/enum_base'

module GirFFI
  module Builder
    module Type

      # Implements the creation of an enum or flags type. The type will be
      # attached to the appropriate namespace module, and will be defined
      # as an enum for FFI.
      class Enum < RegisteredType
        include WithMethods

        private

        def enum_sym
          @classname.to_sym
        end

        def value_spec
          return info.values.map {|vinfo|
            val = GirFFI::ArgHelper.cast_uint32_to_int32(vinfo.value)
            [vinfo.name.to_sym, val]
          }.flatten
        end

        def instantiate_class
          @klass = get_or_define_module namespace_module, @classname
          @enum = optionally_define_constant @klass, :Enum do
            lib.enum(enum_sym, value_spec)
          end
          unless already_set_up
            @klass.extend superclass
            setup_constants
            setup_gtype_getter
            stub_methods
            setup_inspect
          end
        end

        def setup_inspect
          @klass.instance_eval <<-EOS
            def self.inspect
              "#{@namespace}::#{@classname}"
            end
          EOS
        end

        def already_set_up
          @klass.respond_to? :get_gtype
        end

        def superclass
          @superclass ||= EnumBase
        end

        # FIXME: Remove duplication with Builder::Module
        def get_or_define_module parent, name
          optionally_define_constant(parent, name) { ::Module.new }
        end
      end
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
gir_ffi-0.6.6	lib/gir_ffi/builder/type/enum.rb
gir_ffi-0.6.5	lib/gir_ffi/builder/type/enum.rb
gir_ffi-0.6.4	lib/gir_ffi/builder/type/enum.rb